"upsidown" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "upsidown (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "word": "upside down"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Obsolete form of upside down."
      ],
      "id": "en-upsidown-en-adv-eqo30bNA",
      "links": [
        [
          "upside down",
          "upside down#English"
        ]
      ],
      "tags": [
        "alt-of",
        "not-comparable",
        "obsolete"
      ]
    }
  ],
  "word": "upsidown"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "upsidown (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "word": "upside down"
        }
      ],
      "categories": [
        "English adverbs",
        "English entries with incorrect language header",
        "English lemmas",
        "English obsolete forms",
        "English uncomparable adverbs"
      ],
      "glosses": [
        "Obsolete form of upside down."
      ],
      "links": [
        [
          "upside down",
          "upside down#English"
        ]
      ],
      "tags": [
        "alt-of",
        "not-comparable",
        "obsolete"
      ]
    }
  ],
  "word": "upsidown"
}